CVE-2026-33583

Severity CVSS v4.0:

Pending analysis

Type:

CWE-749 Exposed Dangerous Method or Function

Publication date:

13/05/2026

Last modified:

14/05/2026

Description

Exposure of the QKEY (used as <br /> input into the ‘OTA-Quantum’ device registration process) and internal <br /> system keys via an unauthenticated and unencrypted HTTP GET method in the Arqit Symmetric Key Agreement Platform.<br /> <br /> This issue affects Symmetric Key Agreement Platform: before 26.03.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 8.70 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x

8.70

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://www.cvcn.gov.it/cvcn/cve/CVE-2026-33583